What Do The Symbols On A Fire Extinguisher Indicate?

Have you ever wondered what the symbols mean to a fire extinguisher?

You can see fire extinguishers in schools, hotels, or at your workplace. In the event of a fire, it aids you in fighting the flames. It’s vital to know what kind of fire extinguisher you have. Using the incorrect sort of fire extinguishers for the wrong type of fire will prove fatal.

Fire Extinguishers

Fire extinguishers come in five basic varieties. Wet chemicals include things like water, foam, powder, CO2, and other liquids.

What is a Fire Extinguisher?

A fire extinguisher is a type of active fire-fighting equipment that can be used to put out small fires in an emergency. These are kept in places like buildings, schools, factories, public places, or transportation.

Along with ensuring that you have the correct sort of fire extinguisher, you must also select the appropriate size and weight. 

Types of Extinguishers

Below are some types of fire extinguishers:

  1. Water Extinguisher: A red label and a class A rating are found on water fire extinguishers. They can be used to put out flames that involve solid combustibles like wood, paper, and textiles.
  2. Foam Extinguisher: Foam fire extinguishers are particularly effective on class A and class B flames and have a cram label.
  3. CO2 Extinguisher: A black label can be found on CO2 fire extinguishers. They have a class B rating because they are meant for no use on the flammable liquid fire.
  4. Powder Extinguisher: A blue label can be found on powder fire extinguishers. They can be used in all types of fires, including class A, class B, class C, and electrical fires.
  5. Wet Chemical Extinguisher: Yellow-labeled wet chemical fire extinguishers are designed for use on fires involving flammable cooking media such as burning oil and lard.

Fire Extinguishers Classes

Fire Extinguisher Classes

Green, red, blue, yellow, and black letters indicate the sort of fire that each fire extinguisher can put out. Fires can have a variety of fuel sources, each of which must be extinguished uniquely. All fire extinguishers must be prominently labeled for this reason. You need to know what kind of fire extinguisher you’re using. When the wrong extinguisher is used in the wrong situation, it can have disastrous repercussions.

  1. Class A: The green triangle represents everyday flammable items such as paper, wood, cardboard, and plastics, and the image depicts rubbish and wood on the fire.
  2. Class B: Gasoline, kerosene, and oil are examples of flammable or combustible liquids. The red square is the geometric sign, and the image depicts a flaming fuel can.
  3. Class C: Electrical fires, such as those involving appliances, wires, and circuits. A Class C fire should never be put out using water. Because water is a strong conductor, there is a significant risk of electrical shock. The geometric sign is a blue circle, and the image depicts a smoldering electrical wire and outlet.
  4. Class D: For most common fires occurring in chemical laboratories. Combustible metals such as magnesium, titanium, and sodium are involved. The geometric symbol for this class is a yellow star or dragon and the image is not commonly used for this class but you may see one that shows a metal beam and flames.
  5. Class K: Fires that involve cooking oils, or fats in cooking appliances occurring in restaurants or in cafeterias. The black hexagon is the geometric sign, and the image depicts a frying skillet on fire.
  6. Combinations: There are some multipurpose fire extinguishers available, and some of which are frequently used in residential areas. These types of extinguishers are labeled with multiple symbols and pictures to show which fire classes they can be used for. Common combinations you may see are BC and ABC.

Fire Extinguisher Symbols

How to use a Fire Extinguisher?

We should have at least one fire extinguisher around us. Your safety and others’ safety around you depends upon knowing how to use a fire extinguisher.

Make sure that you have a clear path. If you cannot snuff out the fire you will need to make a safe exit as soon as possible. Make sure that you will have multiple exits nearby. 

You should stay away between 8 to 10 feet from the flames when you prepare to operate the fire extinguisher.

In an emergency, it is tough to think about anything so don’t panic and stay calm. If you are trying to put out the fire you have to stay calm.

  • P- PULL pull the fire extinguisher’s pin
  • A- AIM the extinguisher nozzle toward the fire origin.
  • S- SQUEEZE to discharge the extinguisher you have to squeeze the handle.
  • S- SWEEP nozzle back and forth. Keep the extinguisher near the fire and move it from side to side until the flames go out.

After the fire appears to be put out, continue to watch the fire area and make sure it doesn’t reignite. If the fire starts up again then repeat the PASS process.

Call the fire department in your area so that they will be able to inspect the site of the fire. 

If you are unable to put out the fire, leave the area immediately and seek refuge away from the flames.


You should never use a fire extinguisher on a type of fire that is not labeled for. You should exit the place immediately and call the fire department. Always remember that fire extinguishers are only meant to pull out small fires. If the fire spreads you should immediately get to a safe place and call the fire department.

You should all have at least one or two fire extinguishers around you for your safety. It’s critical to get the correct fire extinguisher. The fire extinguisher should be used by people who have been trained on how to use it. Make sure someone else has raised their fire alarm before tackling a fire.

If you can’t pull out the fire or your fire extinguisher is empty then make sure to evacuate yourself and everyone out of the place immediately.

Before pulling out the fire make sure to call the fire department so they can inspect the site of the fire.

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